freefoam-pdfPlot: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/freefoam-pdfPlot - from package: freefoam

You may install the required package with command apt-get install {package}

Error in other languages:
freefoam-pdfPlot: bevel nie gevind nie
freefoam-pdfPlot: comandă negăsită
freefoam-pdfPlot: comando não encontrado
freefoam-pdfPlot: commande introuvable
freefoam-pdfPlot: command not found
freefoam-pdfPlot: käsku ei ole
freefoam-pdfPlot: không tìm thấy lệnh
freefoam-pdfPlot: komanda nerasta
freefoam-pdfPlot: Kommando nicht gefunden.
freefoam-pdfPlot: kommandot finns inte
freefoam-pdfPlot: komut yok
freefoam-pdfPlot: nie znaleziono polecenia
freefoam-pdfPlot: níor aimsíodh an t-ordú
freefoam-pdfPlot: no se encontró la orden
freefoam-pdfPlot: no s'ha trobat l'ordre
freefoam-pdfPlot: opdracht niet gevonden
freefoam-pdfPlot: parancs nem található
freefoam-pdfPlot: perintah tidak ditemukan
freefoam-pdfPlot: príkaz nenájdený
freefoam-pdfPlot: příkaz nenalezen
freefoam-pdfPlot: команда не найдена
freefoam-pdfPlot: командата не е открита
freefoam-pdfPlot: 命令找不到
freefoam-pdfPlot: コマンドが見つかりません